Sifting-machine.



L. E. SIMPSON.

SIFTING-MACHINE.

APPLICATION FILED FB.3.1915. 1,141,,66Q

Patented June 1, 1915.

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I a LOW 6/07 0500 Invantor Attorney L. E. SIMPSON.

SIFTING MACHINE.

APPLICATION FILED FEB. 3. I9I5.

Patnted June 1, 1915.

2 SHEETS-SHEET 2- mamas I L awe f. 5 077 06 0/? f/ y 9 Witnesse vinventor wo w. 3 a mmsww, 33 E Attorney UNITED STATE PATENT FFKQE.

LOWE SIMPSON, 0F CINCINNATI, OHIO, ASSIGNOR TO THE ORVILLE SIMPSONCOMPANY, OF CINCINNATI, OHIO.

SIFTING-MACHINE.

Specificationnf Letters latent.

Patented June 1, 1915.

To all whom it may concern:

Be it known that I, Lown E. SIMPSON, a citizen of the United States,residing at College Hill, Cincinnati, Hamilton county, Ohio, haveinvented certain new and useful Improvements in sifting-Machines, ofwhich the following is aspcification. v

This invention pertains to that class of sifting machines in which a boxis disposed substantially horizontally and carries one or more sieves, ashaking motion being given to the box and its sieves to cause thematerial to move over different parts of the sieves so as to permitsufficiently fine portions of the material to pass through the sievesand the unsifted material to tail off of the discharged end of thesieves, the box with its sieves being adjustable to such degree ofdecline as will facilitate the passage of the unsifted material from thehead toward the tail of the sieves, and the invention relates toimprovements in the construction of machines of this class. i

The. invention will be readily understood from the following descriptiontaken in connection with the accompanying drawings in which Figure 1 isa side elevation of a sifting machine embodying my improvements; Fig. 2a vertical longitudinal section of the same in the plane of line a ofFigs. 3,- 4, 5, 6, 7 and 8; Fig. 3 an elevation of the head end of themachine; Fig. 4 a plan of the sievebox; Fig. 5 an elevation of the tailend of the machine; Fig. 6 a vertical transverse section of thesieve-box in the plane of line b of Figs. 1, 2,and 4; Fig. 7 a verticaltransverse section of the sieve-box in the plane of line 0 of Figs. 1, 2and 4; Fig. 8 a vertical transverse section of the sieve-box in theplane of line d of Figs. 1, 2 and 4; and Fig. 9 a plan of the tail endof the base portion of the machine, parts appearing in the plane of linee of Figs. 1, 2 and 5.

In the drawings 1, indicates a base for the machine, to be of anysuitable form, but illustrated in the form of two transversely connectedlongitudinal timbers: 2, a vertical bearing carried by a bridgetreeat'the'v head end of the base: 3, a vertical shaft fitted to rotate andshift vertically in the bearing 2:

4, a crank-disk fast on the upper end of this shaft and having a plainlower surface: 5, an upwardly open circular socket eccentricallydisposed on and carried by the crankdisk, the floor of this socket beingof hemispherical form, this socket with the disk forming a crank: 6, ahorizontal shaft j ournaled in the bridgetree which supports the crank,this shaft being radial to the axis of the crank: 7, a friction-diskmounted on this shaft and having its periphery in frictional engagementwith the under surface of the crank-disk, this friction-disk beingsecured to its shaft but adjustable along the same to various radialpositions relative to the crank-disk 8, a pulley on shaft 6, typifyingmeans by which that shaft may be rotated: 9, a vertical stud carried bythe bridgetree below the crank-disk and vertically adjustable, the upperend of this stud being normally free from the lower surface of thecrank-disk: 10, a cam mounted on this stud and adapted to adjust thestud upwardly into engagement with the crank-disk and elevate thecrank-disk to a position free of engagement with the friction-disk. 11,a handle by means of which the cam may be turned: 12, a shaft supportedat the tail end of the base of the machine: 13, a pair of arms mountedon this shaft and adapted for ris ing and falling motion independent ofeach other: 14, set-screws engaging the arms and the base and serving inangularly adjusting the free ends of the arms: 15, flanged wheelscarried'by the outer ends of the arms, with their axes parallel withthat of shaft 12 and at right angles to the general length of themachine, there being one of these wheels, with its supporting arm, ateach side of the machine: 16, a sieve-box having a declined floor anddisposed over the base with its head end over the crank-disk and withits tail end over the flanged wheels, the floor of the sieve-boxdeclining from its head toward its tail: 17, shoes carried by the tailend of the sieve-box and engaging treads of the flanged wheels, theshoes engaging, in the illustration, outside the flanges of the wheels:'18, a spherical crank-pin secured below the head end of the sieve-boxand engaging within the socket of the crank-disk: 19, a sieve supportedin the sieve-box and extending from side to side thereof and from thehead of the sieve-box to near its tail: 20,. an upper similarlysupported sieve, of coarser mesh thansieve 19: 21, the tail wall of thesieve-box: 22, the tail end of upper sieve 20,

this tail end terminating a short distance from tail-wall 21: 23, atransverse partition in the sieve-boX,near tail wall 21 and below thetail end of the upper sieve: 24, a chamber formed between the tail-wall21 and partition 23, this chamber extending across the sieve-box: 25, asloping floor for chamber 24, above the floor of the sieve-box andextending from oneside of the sieve-box to near the other side andhaving a vertical portion near its lower end i 26, a discharge portthrough the tail-wall at the foot of chamber 23: 27, the tail end of thelower sieve 19, the same being farther from the tail-wall of thesieve-box than is the tail of the upper sieve: 28, a transversepartition in the sieve-box under the tail end of the lower sieve: 29', achamber formed between partitions 23 and 28, this chamber having adeclining floor, like floor 25, but declining in the oppositedirection:-30, a discharge port leading out through the tail-wall of thesieve-box from chamber 29: and 31, a discharge port, through thetail-wall of the sieve-box, leading from the space in the box below, thetwo sieves and communicating with a passage between discharge ports 26and 30.

The rotation of shaft 6 brings about the rotation of the crank-disk andproduces a gyratory motion, in a horizontal plane, at the head of thesieve-box. The rapidity of the gyrations may be varied, within limits,by adjusting the.friction-disk upon its shaft. The weight of thecrank-disk and the head of the sieve-boxis supported by the fric-'tion-disk, there being no step-bearin needed for the shaft ofthecrank-disk. f it be desired, for any reason, to arrest the motion of thesieve-box, then it is only necessary, by operating handle 11, to turnits cam and elevate its stud which, coming in contact with thecrank-disk raises the crankdisk out of contact with. the friction wheel.This not only severs the driving connection with the crank-disk butapplies to it a brake which causes the sieve-box to quickly come torest.

As the head end of the sieve-box gyrates the tail end reciprocates,though not in a truly right line, due to the fact that the head end ofthe box has considerable side movement. Shoes 17 are disposed againstthe flanges with such looseness or freedom as to prevent the flangesfrom interfering with the reciprocating motion of the shoesnotwithstanding the shoes may not move truly in right lines. I i

By means of the set-screws the two flanged wheels may be raised orlowered to alter the fore-and-aft declination of the sieves," and by adusting the flanged wheels independently the sieves may be adjusted to atransverse lever or to a transverse declination in either direction. Andby reason of the spherical character of the crank-pin which transmitsthe shaking motion to the sievebox, none of these adjustments of theflanged wheels interfere'with the proper transmission of motion from thecrank-disk to the sieve-box.

Assuming the flanged wheels to be so ad- 'justed that sieveshave aslight declination toward their tail ends, the material upon the uppersieve will be caused to shift around thereon in gyratory paths, thesepaths becoming elliptical and substantially straight as the materialmoves down the sieve. The material capable of passing through the uppersieve will go through 'to the lower seive, while coarser material"incapable of passing through the .upper seive will tail ofi into chamber24 and discharge outwardly through discharge port 26 where it may 'betaken care of by any appropriatecharacter of conductor. If 'the tail endof the sievebox be elevated then the progress of the material down theupper sieve will be slower and more time will be given for the siftingaction of the upper sieve, the most violentsifting action occuring, inany event, at the head of the sieve owingto the greater extent ofvibration at that end of the sieve.

Material passing through the upper sieve falls to the lower sieve, thematerial passing through this lower sieve going to the floor of thesieve-box, while material too coarse to go throughthe lower screen tailsoff into compartment 29 and finds its way out of discharge port 30.Material which has passed through both sieves goes down the floor of thesieve-box and finds it way out of discharge port 31.

By adjusting a proper one of the flanged wheels higher than the other,the sieves may be accurately leveled transversely, and, if desired, theymay be thrown out of level transversely, in which latter case thesifting the declination of the sieves, and this may be done withoutarresting the motion of the parts, the greatest variation in the siftingeffect being, however, brought about by adjusting the rate of speed ofshakin which is done by adjusting the friction di radially withreference to the crank-disk. The illustration shows two sieves,supported separably in the sieve-box, but there may be a greater or lessnumber ,of sieves.

I claim 1. A siftin machine comprising, a sievebox, a pair 0 wheelsdisposed below the tail end of the sieve-box, shoes carried by thesieve-box and bearing on the treads of the wheels, mechanism for ratingthe head end of the sieve-box, an means for vertically adjusting saidwheels. independently of each other to modify the longitudinal andtransverse declination of the sieve-box, combined substantially as setforth;v

. 2. A sifting machine comprising, a sievebox, mechanism for supportingand gyrating its head end, a pair of pivoted arms disposed below thetail .end of the sieve-box on tical beaning,-acrank having a shaftjour-.

naled in said bearing and having in its upper portion a. sphericalcrank-socket, means for supporting said crank, mechanism for rotatingsaid crank, a sieve-box having its head end disposed over said crank, aspherical crank-pin carried by the sieve-box and engaging said socketand sup porting the head of the screen, and means for supporting andguiding the tail end of the sieve-box, and adjusting its two sidesindependently, combined substantially as set forth.

4. A sifting machine comprising, a vertical bearing, a crank-shaftjournaled in-said bearing, a crank-disk on the upper end of said shaftand provided with a spherical crank-socket and with a plain lowersurface, a driving-shaft'disposed radially to said crank-shaft, afriction-disk secured to said driving-shaft andengaging the lowersurface of the crankdisk and adjustable along the driving-shaft, asieve-box having its head end disposed over and supported by saidcrank-disk, a spherical crank-pin carried by the sieve-box and engagingsaid socket, and means for supporting. and guiding'the tail end of thesieve-box and adjustin its two sides independently, combined sustantially as set forth.

5. A sifting machine comprising, a vertical. bearing, a crank-shaftjournaled and slidable therein, a crank-disk carried by the upper end ofsaid crank-shaft and having in its upper portion a sphericalcrank-socket and having a pla1n lower surface, a drivingshaft disposedradially to the crank-shaft, a friction-disk carried by'thedriving-shaft and engaging the plain surface of the crankdisk, asieve-box having its head end disposed over and supported by thecrank-disk, a spherical crank-pin carried by the sievebox and engagingsaid socket, means for supporting and guiding the tail end of thesieve-box and adjusting its'two sides independently, a vertically movingmember disposed below said crank-disk and adapted to elevate the head ofthe screen and raise the disk out of contact with the friction disk, andhand-operated mechanism for raising and lowering said vertically movablemember, combined substantially as set forth.

6. A sifting machine comprising, a vertic 1 bearing, a crank-shaft'journaled and slidable therein,a crank-disk carried by the upper end ofsaid crank-shaft and having in its upper portion a sphericalcrank-socket and having a plain lower surface, a drivingshaft disposedradially to the crank-shaft, a friction-disk carried by thedriving-shaft and engaging the plain surface of the crank disk, asieve-box having its head end disposed over and supported by thecrankdisk,

a spherical crank-pin carried by the sieveoperable mechanism foroperating the cam and raising the stud, combined substantially as setforth.

Witnesses:

CORA A. SIMPSON, I Amer. Hnnsmw.

LOWE E. SIMPSON.

